MANET Vehicular Radio

Model, simulate and analyze the performance of two vehicles transmitting videos, files and situational awareness messages to HQ

Netsim Vehicular Radio

 

  • Simulation environment Size: 50 km * 50 km
  • HQ communicating with two vehicular Reece detachments
  • Type of Devices: UHF MANET Radios
  • Mobility Model: Random Way Point
  • Velocity: 160 kmph for Reece detachments
  • Transport Layer: UDP
  • Network Layer: AODV

  • PHY Layer
    • Transmitter Power: 20 Watts
    • Antenna Height: 1 m
    • Receiver Sensitivity: -113 dbm
    • Modulation Technique: QPSK
  • MAC Layer
    • Protocol: DTDMA (Dynamic TDMA)
    • Slot Duration: 2 ms, Frame Duration: 12 ms
    • Guard Interval: 100 microsec
    • Bits per Slot: 3600 bits
    • Overhead Per Slots: 600 bits
    • Network Type: Ad-hoc
    • Slot Allocation Technique: Demand Based

  • RF Propagation:
    • Path Loss Model: LOG_DISTANCE
    • Fading Model: Rayleigh
    • Shadowing Model: Log Normal
Netsim Vehicular Radio

 

Performance Analysis

One vehicle transmitting:

  • FTP starts at 2nd second and the throughput of Video starts dropping
  • FTP ends by 12th second and the throughput of Video starts increasing

Two vehicles transmitting:

  • Since the load on the network has doubled both video and FTP see higher latencies
  • 40x higher latency seen for situational awareness message

Conclusions

  • When the two vehicles are simultaneously transmitting, switch to low res video
  • Avoid video transmission when transmitting data files